Double Disc Gate Valve
Double Disc Gate Valve – Parallel Slide Design Eliminating Wedging Forces
Double Disc Gate Valves feature two parallel discs that slide into the sealing position without wedging action, eliminating thermal binding issues inherent to solid wedge designs in high-temperature steam service and thermal cycling applications. The parallel seating surfaces prevent gate-to-seat galling during temperature transients, making double disc gates essential for African power plants, geothermal facilities, and refineries experiencing severe thermal cycling.
Dominating high-temperature African steam systems from South African coal-fired plants to Kenyan geothermal facilities, double disc gate valves serve DN 50 to DN 900 (2″ to 36″) applications in Class 150-900 ratings. The non-wedging parallel slide design prevents thermal lock-up during startup/shutdown cycles and accommodates non-condensable gases without disc sticking—critical advantages for power generation, refinery steam systems, and geothermal installations where traditional wedge gates experience binding. See our Gate Valve category for general isolation valve information.
Key Features & Benefits
No wedging action
High temperature
Non-condensable gas
Size Range: DN 50 to DN 900 (2" to 36")
Pressure Class: Class 150-900
API 600/API 6D Certified
Global Applications
Superheated steam, saturated steam, and steam distribution systems experiencing thermal cycling where parallel slide design prevents wedging and thermal binding common to solid wedge gates during temperature transients.
Applications with frequent temperature changes, startup/shutdown cycles, and thermal shock conditions where non-wedging parallel discs accommodate thermal expansion without binding.
Gas service with potential non-condensable accumulation where parallel slide design prevents disc sticking and binding issues experienced by wedge gates with trapped gases.
Products
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